Guiding trough, square-to-round adaptor for optical fibers



FIG. 1 is a front, right side and top perspective view of a guiding trough, square-to-round adaptor for optical fibers showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a right side elevation view thereof, the left side elevation view thereof being a mirror image. 

The ornamental design for a guiding trough, square-to-round adaptor for optical fibers, as shown and described. 